This item is compatible with charging for Wii controller.it has 4pcs charge port so it can charge 4pcs controllers at the same time.And it have 4pcs match battery packs.so no need to worry power problem. 1.It can charge 4pcs controllers at the same time. 2.It鈥檚 charging with design of impulse voltage circuit 3.It matched big capacity Ni-MH battery.simple and convenient to use. 4.It鈥檚 taste.tidiness when you put **Use Way:**1.please plug DC5V into input port,power decorate light is blue(if you no need decorate light.please turn switch to 鈥渙ff鈥?if you need. turn to 鈥淥N鈥?/div> 2.please put 1-4PCS matched batteries in controller for charging.the light will turn red when it鈥檚 in charging,after full charging it will turn blue ; **Package Included:**1 x Wii Battery Charger Dock Stand; ;; 4 x 2800 mAh Rechargeable Batteries; ;; 1 x USB Cable Accessory Only,锛圵ii Remote controller NOT included锛?/div>